Flip Lid: one-handed drinking, this lid opens at the touch of a button. When the button lock is locked, the cover cannot be opened.Dust & Leak Proof: The small flip cap can keep dust and dirt out of the drinking spout, Double seal to prevent leakage.Quick Thirst Quenching: Spout lid has a suitable opening ,quick drinking for quick hydration.Compatibility: for Hydroflask, Contigo, Simple Modern, Thermoflask, Iron Flask, Takeya, Hydro CellColour:blackMaterial:PP+ABSPackage Contents:4 x Water cup lidOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.